The third book in the Ascension Series. After the destruction of Mount Weather and the end of The Shadow Bloods, Commander Lexa mourns the loss of Clarke Griffin. Unbeknownst to Lexa, Clarke survived the fall of The Mountain and has made the heartbreaking decision to remain dead to her people and the woman she loves. Carrying the shadow of her betrayal of The Clans, whilst under the influence of The Reaper Drug and unable to accept the black blood that now flows through her veins, Clarke seeks out a new life away from Polis. Her peaceful existsnce is short lived when invaders from across the ocean sail to the lands of The Thirteen Clans searching for a secret thats been hidden for over a century.With them they bring a dark warning of the end of days, an end to life itself. Wanheda must choose to either perish in the fires of Ragnarök or return to warn her people and try to mend the broken heart of her Heda.